Where does “tummentuma” come from?

tummentuma (Finnish) comes from Finnish tummentua, from Finnish -ua, from Proto-Finnic -üdäk — Forms mainly passive or anticausative verbs.

tummentuma (Finnish): (dark) stain or spot, darkening

Definitions

  1. (dark) stain or spot, darkening

Ancestry of “tummentuma”, step by step

StepLanguageWordMeaning
1Finnishtummentuato darken
2Finnish-uaForms stative or inchoative intransitive verbs...
3Proto-Finnic-üdäkForms mainly passive or anticausative verbs
Every word from Proto-Finnic -üdäk →Every word from Finnish -ua →Every word from Finnish tummentua →